Subject: Piston Ring Sticking
Problem: The chemical composition of gasoline has changed significantly during the
past ten years. Most notably, the level of tetraethyl lead has been reduced from
approximately 3 grams per gallon to 1/10 gram per gallon or eliminated completely.
During the same period, oxygenates and ethers were added to enhance octane and extend
supplies of hydrocarbon fuels. Also. beneficial components were removed from some
gasoline's because of blending and economic reasons.
The result of this evolution is that some contemporary gasoline's deposit significant
amounts of carbon during the combustion process.
If these deposits are not addressed, they can reduce engine performance, foul spark plugs,
cause piston ring sticking, and contribute to powerhead failures.
Solution: There are four things that you and your customers can do to minimize the
negative effects of carbon deposits:
· Use a national brand, premium grade fuel. These fuels have ingredients that
promote cleaner combustion and help reduce carbon deposits.
· Use Evinrude or Johnson outboard lubricant. These lubricants are specifically
blended by OMC to provide maximum lubrication while controlling combustion chamber
deposits. (See note below)
· Use OMC Carbon Guard" additive in the fuel. OMC Carbon Guard fuel additive
is formulated to minimize combustion chamber deposits. Cleaner combustion
chambers will reduce the customer dissatisfaction associated with piston ring
· Use OMC Engine Tuner on a regular basis as outlined in the engine operator
manuals. For engines operating under unusual conditions or for older engines that
have not been treated within 100 operating hours, follow the treatment instructions
on the can.
information concerning the use of OMC
Engine Tuner, we have added some tips acquired through experience with the product.
Note: For a full run
down on how oils have been improving, we offer this section covering what TCW 3 oil really is and why.